All colors are strikingly bright in normal light and even brighter in UV lighted conditions! Brighten up your look with PaintGlow UV Hair Chalk. This professional quality UV reactive Hair Chalk easily applies a bright neon color to all hair types and glows brilliantly under UV light. Vibrant and versatile, this hair chalk is ideal for children's parties, raves, festivals, clubbing and more. Perfect for kids and adults alike, this hair chalk washes out easily with shampoo and warm water. Each 2.5 gram disc comes with it's own sponge applicator for quick results and instant bright vibrant colors!